Over time there is a possibility that your gutters will collect unwanted dust and debris including moss. This inevitably silt up the gutter making a great place for seeds to grow! Eventually the gutter start to overflow as the build up increases and stops the rain water from passing down the pipe into the drain. It is quite easy to clear this debris with a long pole having a semi circular piece on the end. You can use this to pull the mess towards you and then place in a bucket and ditch. Be careful as this will involve some ladder work. Eltham Plumbers deal with all kinds plumbing problems large or small. Make sure the ladder is footed, in other words supported by someone else. Do not over reach when up a ladder or lean the ladder on the pipework as it will damage the pipe or slip away. Should the rainwater pipe itself become blocked with the same debris as described it will pose a more difficult problem. You can try pushing a drainage spring up and down the pipework. An Eltham Plumber uses these types of equipment. However sometimes if the pipe is made of plastic it is easier and quicker to disconnect al the sections of pipework and carry out the process at ground level. This is a good way of inspecting and clearing the whole section. It will usually be a blockage at the bottom end of this pipework, causing the water to back up and spill out of the joints. These joints were not intended or indeed manufactured to be watertight. The blockage that was mentioned earlier in the bottom section is nearly always caused by a blockage located in the gully section and can be simply cleared out by hand.